First of all, you can look at the appearance of potatoes, the general new potato appearance, thin skin, more water, and Chen potatoes because of the preservation of a winter, the epidermis are mostly brownish brown and not bright;

Second, the new and old potatoes can be distinguished by the thick of the potatoes'epidermis. The skin of the new potato is so thin that it can be rubbed off without too much force. And Chen potatoes is not, because put in the cold storage time is long, after a period of time skin aging, become very thick, can also use nails gently in the skin of the potato, the epidermis immediately opened the new potatoes, the surface is not cracked is the Chen potatoes.

In addition, the new potatoes are generally divided into yellow meat and two kinds of white meat, yellow face, whiter than sweet. When buying potatoes, do not choose to grow buds, because the place of long buds contain toxins, and flesh into dark gray or black spots, mostly frostbite or bad, are unfit to eat.